ultra-long range

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FSC-BP104DL Silicon Labs EFR32BG21 Ultra-Long-Range 1000m Waterproof IP67 Bluetooth Low Energy 5.4 BLE Beacon with Replaceable Battery

FSC-BP109 Qualcomm CSR8811 Ultra-Long-Range 4000m Dual-Mode Bluetooth 4.2 USB Beacon with Whip Antenna